Securing-bolt



A. M. ONEILL.

WITNESSES Patented Aug. 10, 1920.

UNITED STATEd PATENT ()FF'ICE.

ARTHUR, M. ONEILL, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 JOHN D.BROWN,

0F PITTSBURGH,

PENNSYLVANIA.

SECURING-B 0LT.

Specification of Letters Patent.

Patented Aug". 10, 1920;

Application filed January 14, 1919. Serial No. 271,031.

To all whom it may concern:

Be it known that I, ARTHUR M. ONEILL, a cit'zen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Securing-Bolts, of which the following is a specification.

y invention consists of an improvement in securing bolts or pins, andhas for its object to provide a device of this kind adapted to bepositively and securely retained in position and to be quickly andeasily inserted or removed by means of a spring actuated locking dog,constructed and adapted to operate in the manner more fully hereinafterdescribed.

In the drawings showing one form of the device,

Figure 1 is a View of the bolt in side elevation with the locking dogextended to locking position;

Fig. 2 is a similar View, partly in section, showing the dog retracted;

Fig. 3 is a view similar to Fig. 1, partly in section, showing the boltcombined with a supplemental spring; and

Figs. 4 and 5 are end views of the bolt showing the locking dog inerected and depressed position respectively.

The bolt 2, of any suitable length and diameter, is provided with a head3 having an annular shouldered groove 4 by which it may be easilygrasped by the fingers for easy withdrawal.

At its other end, the bolt is longitudinally slotted as at 5 for thegreater portion of its diameter, open at one side as at 6 and closed atthe opposite side by the longitudinal integral wall 7 and backwardlyfrom its terminal for a suflicient distance to provide for the insertionand manipulation of the pivoted locking dog 8.

The dog is of a width to provide by its rear terminal 9 a good retainingor limiting abutment for engagement against any suitable surface a, asthat of a plate, eyebar, link, or against the face of any element orelements to be connected or held together by the bolt. In a similarmanner, the inner side of head 3 engages against an opposite similar orco-acting face 6, as will be readily understood.

Dog 8 is enlarged at its middle portion, as shown, and is pivotallymounted in slot 6 between the sides of the bolt, at or about its middle,by a pin or rivet upon which it may freely rock, and a spring 11 ismounted in any suitable manner, as by inserting its end in a slot in thedog, as indicated at 12. Holding end 9 of the dog is preferably soinclined to its outer edge that it will assume a right angle to thecenter of the bolt when erected, as in Fig. 1, and thus bear freelyagainst the face a for good holding action.

The outer terminal 13 of the dog extends somewhat beyond the terminal ofthe bolt and is preferably tapered at one or both edges, providing amanipulating terminal, which may be thrust outwardly by the fingers orany suitable instrument to depress inner terminal 9, as in Fig. 2. Insuch position, its end 9 bears against the inclined face 14, forming aportion of the inner end of slot 6, and face 14: is preferably solocated as to just meet the end face of terminal 9 when the outer edgeof the dog is depressed inwardly to coincide with the outer cylindricalface of the bolt. The dog will operate to open or close, however,irrespective of the limiting face 14-.

The outer edge of the bolt beyond rivet 10, being slightly inclinedinwardly, provides ample clearance for withdrawing the bolt through itsreceivin hole or holes. thrust inwardly to the full depth, and with thedog properly positioned, spring 11 will then thrust the inner end of thedog outgardly to its normal holding position, as in When desired, acoiledspring 15 may be utilized between head 3 and face I) as when thebolt is longer between the dog and the bolt head than the distancebetween opposite faces a and 6. Such spring acts to positively bring theholding end of the dog into engagement with its co-acting face.

It will be understood that the device may be changed or modified inconstruction, proportions, or details by the skilled mechanic to suit itto plication, sidered as claim.

What I claim is:

securing bolt having a head at one end and provided at its other endwith a longitudinal central slot extending centrally through the majorportion of the bolt with an outer opening at one side, a closing wallbut all such changes are to be conwithin the scope of the following Whenvarying conditions of use or apr at the other side and an outwardlysloping bolt and lengthwise thereof and a spring 10 inner bearing end, alocking dog pivotally mounted in the slot between the looking dogmounted at its middle portion in said slot and the bolt adapted tonormally extend the between the sides of the bolt provided at inner endof the locking dog outwardly beits inner end with a sloping abutmentteryond the bolt.

minal adapted to be depressed flush with In testimony whereof I hereuntoaflix my 15 the bolt periphery and against said sloping signature.

bearing and at its outer end with a tapered terminal extending beyondthe end of the ARTHUR M. ONEI'LL.

